Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3cc06b56b6dd3afcdf602352245754d7c24ebcc2e25a15fe975fbb1aa40ea291' 
  AND token = 'ah+2mogHdpzA4L6bXFNn0B0BlD6LDkln+rXGlrBOOL4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}